/**
 * @Author:  蓝建平
 * @Description:
 * @Date:  2019/12/5
 */
void main()
{
  //多个异步操作
  Future.wait([Future.delayed(Duration(seconds: 2),(){
    return "hello";
  }),
    Future.delayed(Duration(seconds:12),(){
      return " Flutter";
    })])
      .then((results){print(results[0]+results[1]);});
}